The number of sightings of individuals comprising network A and network B-E.

<p>The number of sightings of individuals comprising network A and network B-E.</p

Chi square pair-wise comparison of the proportion of permanently marked individuals for social networks A-E.

<p>Chi square pair-wise comparison of the proportion of permanently marked individuals for social networks A-E.</p

Survey effort and photo identification analysis.

<p>Survey effort and photo identification analysis.</p

Distance from shore.

<p>The distance from shore for bottlenose dolphin groups that comprised network A (left) and networks B-E (right). The boxplot displays the mean and the 1^st and 3^rd quartile of the distance from shore. Whiskers indicate one standard deviation from the mean. Note the logarithmic scale of the Y-axis.</p

Social network analysis: sociogram of permanently marked individuals.

<p>Five social clusters (A-E), as identified by the social network analysis of associations of permanently marked bottlenose dolphins. Each symbol represents one individual, with the size of the symbols corresponding to the number of sightings of each individual (range: 1–18 sightings per individual). Blue squares represent individuals with typical scarring to the tip of the dorsal fin. Individuals without dorsal fin tip damage are represented by red squares. Black lines represent associations between individuals. The network composition has been manually adjusted to enhance the visualization of the separate clusters.</p

Grades of severity of dorsal fin scarification.

<p>Examples of the mark severity grades of dorsal fin scarification as applied in this study. (A) Permanently marked, (B) Temporarily marked, (C) Superficially marked, (D1-3) Permanently marked with damage to the tip of the dorsal fin. Pictures represent images cropped using Irfanview software.</p